7NG0440-0BA01-0AF0-ZC20E00 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

7NG0440-0BA01-0AF0-ZC20E00 SIEMENS Exclusive SITRANS TF420 Temperature Transmitter Original Brand New

The SIEMENS SITRANS TF420, model 7NG0440-0BA01-0AF0-ZC20E00, is a highly reliable and versatile temperature transmitter designed for industrial applications where precision, stability, and operational safety are essential. Built with a robust die-cast aluminum enclosure, this transmitter is engineered for wall or pipe mounting and is available in a single-chamber version to optimize durability while maintaining a compact design. Its universal input capability supports a wide variety of temperature sensors, making it suitable for different industrial environments and applications.

One of the defining characteristics of the SITRANS TF420 is its ability to connect two independent input circuits. This allows for redundant operation, ensuring maximum input availability and reducing the risk of downtime during critical processes. The transmitter incorporates galvanically isolated 2-wire outputs with HART communication protocol (4 to 20 mA), offering accurate transmission and seamless integration into modern automation systems. Compliance with functional safety standards such as IEC 61508 SIL2/3 ensures that this device meets demanding safety requirements, making it suitable for regulated industries and mission-critical operations.

Overview

The SITRANS TF420 supports redundant input configurations, drift detection, and advanced diagnostic capabilities. Communication can be established via HART 7, Profibus PA, or SIMATIC PDM, enabling flexible configuration options. In addition, optional local operation makes it possible to configure the device directly on-site without external tools, ensuring efficient setup and maintenance.

Function

This temperature transmitter amplifies and linearizes signals from thermocouples, RTDs, resistance, or millivolt inputs. Both input and output sides are galvanically isolated, ensuring signal integrity. Integrated cold junction compensation provides reliable thermocouple measurements. The device delivers a temperature-linear output signal of 4 to 20 mA, supporting both analog and digital communication for diagnostics and real-time monitoring.

Configuration

Users can configure the SITRANS TF420 using PC software, a HART communicator, or Profibus PA. Automatic sensor backup ensures uninterrupted operation: if the primary input fails, the device instantly switches to the secondary input. Convenient test terminals allow current loop testing without interrupting output signals, simplifying maintenance in demanding environments.

Product Code: 7NG0440-0BA01-0AF0-ZC20E00

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